[ https://issues.apache.org/jira/browse/HADOOP-9168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matt Foley updated HADOOP-9168: ------------------------------- Fix Version/s: (was: 1.2.0) > The Naming and Inheritance for RecordReader, LineRecordReader, LineReader > -------------------------------------------------------------------------- > > Key: HADOOP-9168 > URL: https://issues.apache.org/jira/browse/HADOOP-9168 > Project: Hadoop Common > Issue Type: Improvement > Components: util > Affects Versions: 0.21.0, 2.0.2-alpha, 0.23.5 > Reporter: Gelesh > Priority: Minor > Labels: Hadoop, InputFormat > Fix For: site, hudson, 0.23.2 > > Original Estimate: 96h > Remaining Estimate: 96h > > I feel LineReader is not the correct name, since it reads up to a given > delimiter. > How about Text Record Reader ? > Sounds correct but LineReader is not a RecordReader by inheritance, > but by functionality , yes it is the Record reader. > Now if we look at it with a different angle, > In General, > InputFormat would mostly has two responsibilities > 1)To Read A split > 2)Generate Key & Value pairs based upon the Reading done over Split. > Now in TextInputFormat, > Has a RecordReader, Which is inherited by LineRecordReader, > which uses another class LineReader. > But We Have > LineReader, which does the reading of the file. > LineRecordReader generates key & Value. > I would suggest, > RecordReader to be renamed as KeyValueGenerator, > LineRecordReader to be renamed as TextInputKeyValueGenerator, > LineReader to be renamed as delimitedTextReader, > Generic attributes of LineReader (such as start, pos, end, buffer, > bufferBytes .. etc ) to be abstracted to a class called RecordReader, > Since its all specific to reading of the given input. > delimitedTextReader class could extend RecordReader. > Now the names could make better scene. We must also look into computability > as well. It might be un fit to deploy unless a new API is introduced. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira